【作者】 王学求； 谢学锦； 张本仁； 侯青叶；

【Author】 WANG Xue-qiu 1),XIE Xue-jin 1),ZHANG Ben-ren 2),HOU Qing-ye 2) 1) Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang,Hebei 065000;2) China University of Geosciences,Beijing 100083

【机构】 中国地质科学院地球物理地球化学勘查研究所； 中国地质大学(北京)；

【摘要】 重点发展地壳全元素精确分析技术、地壳深部物质成分识别技术、盆地穿透性地球化学探测技术和化学地球构建技术。参照全球地球化学基准网,以1:20万图幅为基准网格单元,建立一个覆盖全国的地球化学基准网,系统采集不同时代沉积岩、变质岩和火成岩样品以及疏松沉积物样品,获得中国大陆地壳76种元素基准值,研究化学元素在中国大陆的演化历史和成矿物质背景。通过地球化学走廊带的探测试验与示范,形成地壳物质成分探测技术体系,为开展全国地壳探测工作奠定基础,并为最终建立"化学地球"进行技术准备和先导性实验。包含5个研究课题:(1)全国地球化学基准值建立与综合研究;(2)地壳深部物质成分识别技术;(3)盆地穿透性地球化学探测技术;(4)化学地球软件构建技术;(5)地球化学走廊带探测实验与示范。更多还原

【Abstract】 The goals of the project are to(1) develop four geochemical methodologies,namely analytical methods for all the elements,deep-penetrating geochemical methods,earth crust geochemical model and global geochemical data visualizing software,(2) establish China’s nationwide geochemical baselines for rocks and soils,(3) make the crust geochemical models by pilot study of three geochemical transects to display element distribution in upper,middle and lower crust,(4) explore the evolution of elements in different tectonic plates of China with geological times from Archaean to Quaternary,and(5) identify areas of interest for mineral resources and environments.Totally 15 000 typical rock samples and 6 000 soil samples will be collected in the China Geochemical Baselines Networks covering the whole mainland and 6000 samples will be collected along the 3 transects,with the determination of 78 elements.The project includes the following five programs:China Geochemical Baselines,China Continental Earth Crust Geochemical Reference Model,Deep-penetrating Geochemistry through Cover and Basin,Geochemical Earth Software,and Geochemical Evolution with Geologic Times along Transects.更多还原